Change width for site map frontend, add link for more in announcement widget

app/views/admin/sites/sitemap_frontend.html.erb

@@ -16,7 +16,7 @@
   $(document).ready(function(){
     $('.site-map').masonry({
       itemSelector: '.map-block',
-      columnWidth: 260,
+      columnWidth: 220,
       isAnimated: true
     });
   });